3894805989 has 12 divisors (see below), whose sum is σ = 5638829196. Its totient is φ = 2590538112.

The previous prime is 3894805987. The next prime is 3894806021. The reversal of 3894805989 is 9895084983.

3894805989 is a `hidden beast` number, since 38 + 9 + 4 + 8 + 0 + 598 + 9 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 2041503489 + 1853302500 = 45183^2 + 43050^2 .

It is not a de Polignac number, because 3894805989 - 2¹ = 3894805987 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3894805987) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 495822 + ... + 503615.

It is an arithmetic number, because the mean of its divisors is an integer number (469902433).

Almost surely, 2^3894805989 is an apocalyptic number.

It is an amenable number.

3894805989 is a deficient number, since it is larger than the sum of its proper divisors (1744023207).

3894805989 is a wasteful number, since it uses less digits than its factorization.

3894805989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 999876 (or 999873 counting only the distinct ones).

The product of its (nonzero) digits is 22394880, while the sum is 63.

The square root of 3894805989 is about 62408.3807593179. The cubic root of 3894805989 is about 1573.3618292931.

The spelling of 3894805989 in words is "three billion, eight hundred ninety-four million, eight hundred five thousand, nine hundred eighty-nine".